Edward ford



E. FORD.

Quartz Crusher.

Patented Nov. 10, 1868.

E m w m ddnital Siam g amme.

EDWARD FORD, OF SAN FRANCISCO, CALIFORNIA.

Letters Patent No. 83,842,

dated November 10, 1868.

ILCPROVED QUARTZ-CRUSHER.

The Schedule referred to in these Letters Patent and making part of the same To .all whom it may concern:

Be it known that I, ED ARD FORD, of the city and county of San Francisco, State of California, have in vented an Improved Quartz-Crusher and I do hereby declare the following description and accompanying drawings are sufficient to enable any person skilled in the art or science to which it most nearly appertains, tomake and use my said invention or improvements without further invention or experiment.

The obj ect'of my invention is to, provide an improved machine for crushing quartz and other rocks, and more especially such as contain precious metals, and it consists in placing a series of vertical dies one above another; also, a series of stamps, which act horizontally against these dies, by means of springs behind them, and which are operated by cams and tappets, so that, as the ore is fed to the upper stamp, it is reduced to a certain degree of fineness, and then passes, through a screen, to the second, where it is still further reduced. The stamps have a certain length of face, and are run at such a speed as to catch the falling ore as it passes between them and the dies, thus effectually crushing it.

To more fully explain my invention, reference is had to the accompanying drawings, and letters marked thereon, forming a part of this specificatiomof which- Figure 1 is a side sectional elevation.

Figure 2 is an end sectional view.

Similar letters of reference, in each of the figures, indicate like parts.

- Two stamps, A and B, are shown, which are properly supported by a frame-work, O.

The stamps have shoes, 1) D, and operate against the vertical dies E E.

Fromthe top of the frame, two swinging supports, F F, descend, and are attached to the two stamps A and B.

At the rear end, the stain'pstems are firmly fastened to strong springs,"G G, of such form as may be found suitable, or other equivalent device may be employed for impelling the stamps.

The two shafts H H extend across the frame, and carry the cams I I, which, coming in contact with the tappets J J, force the stamps back, compressing the Guides, K K, are placed each side of the stampheads, to direct the blow, and also the falling ore, the guides being lined with sheet-iron.

If found more effective, the dies may be placed at an incline, the stamps working at right angles to them.

I prefer the face of the upper stamp in the form of a parallelogram, having a depth of about two inches, and a width of four anda half, and making about one hundred and fifty blows per minute.

The lower stamp has a face of nine inches deep, by four and one-half wide, and makes three hundred blows per minute.

' The width of the face of the die should be governed by the quantity of ore fed, and the length by the ra pidity of motion with which the stamps are driven.

The ore is placed in the hopper L, in pieces about the size of an egg, the aperture in the hopper being just suflicient to supply such a quantity only as can becrushed, and not enough to impede the-stamp, and, as it falls before the stamp A, it is crushed sufiiciently fine to pass through the screen M, whence it falls be fore the stamp B, and is still further reduced, it being intended that the face of the die shall'bear such a ratio to the rate of speed,and the amount fed, that it will be just covered by the falling ore all the time, thus insuring the most speedy. and thorough crushing possible.

Any number of stamps may be used below each other, or the ore may be re-fed to the same stamps.

Having thus described my invention,

What I'claim, and desire to secure by Letters Patent, is-

The horizontally-acting batteries A and B, when placed one above the other, and acting against the vertical dies E E, with the screen M, and feeding the ore from one to the other, the whole constructed and operating substantially as and for the purpose herein described.

In witness whereof, I have hereunto set my hand and seal.

EDW'D. FORD. [11. s.] Witnesses:

J. L. Booms, O. W. M. SMITH.

springs until the tappets are released, when the stamps are impelled against the dies. 

